我正在尝试在 docker 下运行(任何)容器,并启用 no-new-privileges 标志并启用 Selinux。
基本信息:
CentOS 7.3 on bare metal
docker-ce 17.05.0-ce (edge) from official repo
docker-ce-selinux 17.05.0-ce (edge) from official repo
(我最初运行稳定,并切换到边缘版本希望修复)
我正在尝试做的事情:
docker run --security-opt "no-new-privileges" -it --rm busybox /bin/sh
会发生什么:
standard_init_linux.go:178: exec user process caused "operation not permitted"
支持所有功能 - Selinux 在未指定 no-new-privileges 时工作;当守护进程在没有 selinux 支持的情况下运行时,no-new-privileges 起作用。宽容模式与强制模式没有任何效果。
码头工人信息:
Containers: 0
Running: 0
Paused: 0
Stopped: 0
Images: 40
Server Version: 17.05.0-ce
Storage Driver: btrfs
Build Version: Btrfs v4.4.1
Library Version: 101
Logging Driver: journald
Cgroup Driver: cgroupfs
Plugins:
Volume: local
Network: bridge host macvlan null overlay
Swarm: inactive
Runtimes: runc
Default Runtime: runc
Init Binary: docker-init
containerd version: 9048e5e50717ea4497b757314bad98ea3763c145
runc version: 9c2d8d184e5da67c95d601382adf14862e4f2228
init version: 949e6fa
Security Options:
seccomp
Profile: default
selinux
Operating System: CentOS Linux 7 (Core)
OSType: linux
Architecture: x86_64
CPUs: 2
Total Memory: 3.536GiB
Name: localhost.localdomain
ID: EAGL:4QBW:GYM3:XY3U:YOSJ:7NBJ:O5OB:6HWY:S255:2X7D:MFHN:ZOYS
Docker Root Dir: /var/lib/docker
Debug Mode (client): false
Debug Mode (server): false
Username: -----
Registry: https://index.docker.io/v1/
Experimental: false
Insecure Registries:
127.0.0.0/8
Live Restore Enabled: false
结果是“sudo ausearch -m avc -ts 最近”
<no matches>
但结果是“sudo ausearch -m SELINUX_ERR -ts 最近”
time->Tue May 23 02:07:55 2017
type=PROCTITLE msg=audit(1495519675.981:996345): proctitle=2F70726F632F73656C662F65786500696E6974
type=PATH msg=audit(1495519675.981:996345): item=0 name="/bin/sh" inode=260 dev=00:22 mode=0100755 ouid=0 ogid=0 rdev=00:00 obj=system_u:object_r:svirt_sandbox_file_t:s0:c7,c132 nametype=NORMAL
type=CWD msg=audit(1495519675.981:996345): cwd="/"
type=BPRM_FCAPS msg=audit(1495519675.981:996345): fver=0 fp=0000000000000000 fi=0000000000000000 fe=0 old_pp=00000000a80425fb old_pi=00000000a80425fb old_pe=00000000a80425fb new_pp=00000000a80425fb new_pi=00000000a80425fb new_pe=00000000a80425fb
type=SYSCALL msg=audit(1495519675.981:996345): arch=c000003e syscall=59 success=no exit=-1 a0=c420142260 a1=c420142270 a2=c420122960 a3=0 items=1 ppid=30894 pid=30910 auid=4294967295 uid=0 gid=0 euid=0 suid=0 fsuid=0 egid=0 sgid=0 fsgid=0 tty=pts1 ses=4294967295 comm="runc:[2:INIT]" exe="/usr/bin/docker-runc" subj=system_u:system_r:container_runtime_t:s0 key=(null)
type=SELINUX_ERR msg=audit(1495519675.981:996345): op=security_bounded_transition seresult=denied oldcontext=system_u:system_r:container_runtime_t:s0 newcontext=system_u:system_r:svirt_lxc_net_t:s0:c7,c132
我认为这里的关键是
type=SELINUX_ERR msg=audit(1495519675.981:996345): op=security_bounded_transition seresult=denied oldcontext=system_u:system_r:container_runtime_t:s0 newcontext=system_u:system_r:svirt_lxc_net_t:s0:c7,c132
如果我没看错的话,没有新的权限会阻止 selinux 转换。有谁知道解决这个问题的方法,除了禁用其中一项安全功能之外?如果需要更多信息,请告诉我!